package com.lzj.gallery.library.adapter;
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import android.content.Context;
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import androidx.viewpager.widget.PagerAdapter;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ImageView;
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import com.bumptech.glide.Glide;
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import com.bumptech.glide.load.engine.DiskCacheStrategy;
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import com.bumptech.glide.load.resource.bitmap.RoundedCorners;
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import com.example.guangdiantongsdk.R;
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import com.lcjian.library.widget.RatioLayout;
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import java.util.List;
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/**
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* Created by Administrator on 2018/11/28.
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* banner的适配器
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*/
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public class BannerPagerAdapter extends PagerAdapter {
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private List<String> mList;
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private Context mContext;
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private int defaultImg = R.mipmap.ic_banner_error;//默认图片
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private int mRoundCorners = -1;
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private int mMaxNumber;//最大banner数
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private Float imgRatio;
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/**
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* 默认
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*
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* @param defaultImg
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*/
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public void setDefaultImg(int defaultImg) {
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this.defaultImg = defaultImg;
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}
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/**
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* 设置圆角
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*
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* @param mRoundCorners
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*/
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public void setmRoundCorners(int mRoundCorners) {
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this.mRoundCorners = mRoundCorners;
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}
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/**
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* 点击回调
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*/
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public interface OnClickImagesListener {
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void onImagesClick(int position);
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}
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private OnClickImagesListener mImagesListener;
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public void setOnClickImagesListener(OnClickImagesListener listener) {
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mImagesListener = listener;
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}
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public BannerPagerAdapter(List<String> list, Context context, Float imgRatio) {
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// this.mList = list;
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this.imgRatio = imgRatio;
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this.mContext = context;
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if (mList == null) {
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mList = list;
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}
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if (list.size() > 20) {
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this.mMaxNumber = 20;
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} else {
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this.mMaxNumber = list.size();
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}
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}
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@Override
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public int getCount() {
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return mList.size() == 1 ? 1 : Integer.MAX_VALUE;
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}
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@Override
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public boolean isViewFromObject(View view, Object object) {
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return view == object;
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}
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@Override
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public void destroyItem(ViewGroup container, int position, Object object) {
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container.removeView((View) object);
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}
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@Override
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public Object instantiateItem(ViewGroup container, int position) {
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View view = LayoutInflater.from(mContext).inflate(R.layout.banner_img_layout, container, false);
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ViewGroup.LayoutParams params = view.getLayoutParams();
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ImageView imageView = view.findViewById(R.id.img);
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RatioLayout rl = view.findViewById(R.id.rl_img);
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if (imgRatio != null)
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rl.setRatio(imgRatio);
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final int index = position % mMaxNumber;
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LoadImage(mList.get(index), imageView);
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//OnClick
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imageView.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View v) {
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mImagesListener.onImagesClick(index);
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}
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});
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container.addView(view);
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return view;
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}
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/**
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* 加载图片
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*/
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public void LoadImage(String url, ImageView imageview) {
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if (mRoundCorners == -1) {
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Glide.with(mContext)
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.load(url)
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// .centerCrop()
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.dontAnimate()
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.placeholder(defaultImg)// 加载中图片
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.error(defaultImg) // 加载失败图片
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.diskCacheStrategy(DiskCacheStrategy.AUTOMATIC)//设置磁盘缓存
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.into(imageview);
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} else {
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Glide.with(mContext)
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.load(url)
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.centerCrop()
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.dontAnimate()
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.placeholder(defaultImg)// 加载中图片
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.error(defaultImg) // 加载失败图片
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.transform(new RoundedCorners(mRoundCorners)) //
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.diskCacheStrategy(DiskCacheStrategy.AUTOMATIC)//设置磁盘缓存
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.into(imageview);
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}
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}
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}
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